#include "stm32f10x.h"    // Device header
//using B14 as the port
uint16_t CountSensor_Count;
void CountSensorInit()
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
	GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12;
	GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStructure);
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource12);
	EXTI_InitTypeDef EXTI_InitStructure;
	EXTI_InitStructure.EXTI_Line=EXTI_Line12;
	EXTI_InitStructure.EXTI_LineCmd= ENABLE;
	EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;
	EXTI_Init(&EXTI_InitStructure);
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	NVIC_InitTypeDef NVIC_InitStructure;
	 NVIC_InitStructure.NVIC_IRQChannel=EXTI15_10_IRQn;
	 NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
	 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
	 NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
	 NVIC_Init(&NVIC_InitStructure);
}
uint16_t CountSensor_Get(void)
	{
		return CountSensor_Count;
	}
void EXTI15_10_IRQHandler(void)
{
	if(EXTI_GetITStatus(EXTI_Line12) == SET)
	{
		CountSensor_Count++;
		
		EXTI_ClearITPendingBit(EXTI_Line12);
	}
		
}
